Man, we're looping again and again on the same thing. It's not rocket science. Don't focus on the term arena. It's not gonna be an arena stage as it is (like a stadium SSS).
There will be an arena WITHIN the final stage, where people can have services and festival atmosphere. It doesn't automatically mean it's gonna be a 2km mickey mouse stage. The final Red Barn arena it's an arena, BUT within a 10km stage. Which IMHO is fair enough, 'cause it gives sponsors exposure, space for hospitalities, etc., while keeping it a proper stage to enjoy.
Off Topic: Regarding the results, but here it's FIA JOB (and this is NOT the appropriate topic to discuss it), an idea could be scrap Super Sunday points and keep the Power Stage one.